"these plugs work great as of 20K miles the car runs well and notice no lack of power."
posted by: JT on January 30, 2012

"Replaced the NGK's in my 740i with Bosch plugs and that was a mistake. I had 133,000 on the NGK's and they never missed a beat. I did not know what brand was in my engine so i bought Bosch. Performance is down and horsepower is less. I use to race back in the 60's and used NGK's and they were great. Nuff said."posted by: on February 22, 2010view all 8 reviews

DENSO CorporationDENSO Corporation, headquartered in Kariya, Aichi Japan, is the number one global automotive supplier of advanced technology, systems and components in the areas of thermal, powertrain control, electric, electronics and information and safety.

Bosch Premium Class Platinum+4 Spark Plug contains the most platinum in the Bosch Platinum Plug Series and has a unique firing technology that combines the advantages of surface air gap technology and 4 yttrium enhanced ground electrodes.

Specifications:

14 mm thread size

19 mm reach

16 mm hex size

Platinum plug

Gasket seat style

Interference suppression resistor

Surface air gap plug

Heat fused platinum center electrode

4 ground electrodes

Heat range 8

Features:

Reduces the voltage necessary to jump the gap as well as quenching

Provides multiple radial spark paths and surface air gap design that creates optimal exposure of the air/fuel mixture to the enhanced ignition spark

"FIRST TIME USING THESE PLUGS EASY TO INSTALL ALREADY FEEL THE PERFORMANCE AND THEY HAVE INCREASED MY GAS MILEAGE SO WIN WIN FOR ME IF YOU HAVENT USED THESE YET YOU GOT TO TRY THEM"posted by: HAWK on July 11, 2014

"Put these in my 96 Saturn SL2 over 7-8 years ago and by far these are the best plugs I have ever bought. Went and bought the best that O reilly s had which were NGK top of the line and no comparison. I m looking for 4 more Bosch Platinum +4 as we speak.In fact even though the plugs look very worn down I might install them back in until i get the new set in and return the NGK s"posted by: on May 19, 2014view all 5 reviews

AC Delco Rapidfire Performance Platinum Spark Plugs offer longer life and improved efficiency over time. It fits engines that run conventional plugs, as well as newer vehicles that require platinum plugs.

Features:

Constructed from top quality materials to help the engine run clean and longer

Copper core center electrode for improved heat transfer to the tip

Engineered to high standards and tested under extreme conditions to exceed OE specifications

"Changing out your spark plugs can make a big difference in how your vehicle runs. If you want to have more power and use less gas this is one thing you can do to help. Be sure to make sure the spark plug gap is set correctly for your vehicle."posted by: Mark J. on March 26, 2014

Pulstar Pulse Spark Plug contains integrated electrical capacitor that focuses on the energy of the plug. Its electrical energy delivers the fuel mixture far beyond the typical conventional spark plugs and produces not only better fuel efficiency, but also increased torque and horsepower.

"1 out of 4 will miss at low speed while driving. I had to order an extra to replace a bad one that would misfire at low speeds. Pulstar s manufacturing quality control should do a better job of checking out going product."posted by: Bruce on July 21, 2014

"I put these in my Vtwin motorcycle in November. In March the bike quit running. Took it to a dealer and all he had to do to get it running was put normal plugs in it. Hope nothing permanently damaged. Told a friend about it after the fact and he described the same trouble with his Chevy truck. His mechanic said they burn extra hot and mess up the computer sensors."posted by: GOC Sensei on March 12, 2014

"I replaced my 10 year old ----- Platinum +4 spark plugs which I was still getting 38 MPG highway with over 225k miles. After replacing with E3, my MPG fell to 32 MPG highway. Disappointed to say the least. I'm returning and going back to a new set of +4's."posted by: MJ on December 19, 2011view all 8 reviews